Drier.



No. 7l2,l28. Patented Oct. 28, I902.

. A. GIESLER.

DRIER.

(Applicafion filed Apr. I8, 1902.)

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ARTHUR GIESLER, OF DAYTON, OHIO, ASSIGNOR TO THE STILWELL-BIEROE & SMITH-VAILE 00., OF DAYTON, OHIO, A CORPORATION OF NEW JERSEY.

DRIER.

SPEGIFICATION formingpart of Letters Patent No. 712,128, dated October 28, 1902.

Application filed April 18, 1902. Serial No. 103,508. (No model.)

T0 at whom it may concern:

Be it known that I, ARTHUR GIESLER, a citizen of the United States, residing at Dayton, in the county of Montgomery and State of Ohio, have invented certain new and useful Improvements in Driers; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make-and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in driers of the class'used in the process of rendering animal and fish meats and the refuse therefrom. The process is well known, and consists, first, inextracting the oil and grease from the meats, and, secondly, in producing a fertilizer from the residue or solid matter. In carrying out the last-named operation in the process a drier is used into which the solid matter isintroduced. Such drier in order to successfully perform its functions and have proper lasting qualities must be of great strength in all its parts, especially in the con struction and mounting of the rotating agitator-arms, which are required to agitate and stir the mass of matter within. the body of the drier. It is also essential in machines of this character that the doors thereto, through which the product is emitted, have a proper fit and that such doors may be operated easily and quickly in closing and opening the same.

It is therefore the object of thepresent invention to improve the agitator-arms and their mountings, and, further, to provide a door which meets all the above requirements. Preceding a detail description of the inven: tion reference is made to the accompanying drawings, of which Figure 1 is a side elevation, partly in section, of a drier having my improvements applied thereto. Fig. 2 is a section through a portion of the shell, showing a portion of the agitators and their shaft. Fig. 3 is a crosssectional view of the inner shell, showing an end elevation of the agitators, one of the twopart hubs, and agitators. Fig. 4' is a View looking upwardly on the lower side of the drier, showing a bottom plan view of one of the doors and its operating mechanism. Fig. dis a sectional View on the line y'yof Fig. 4:. Fig. 6 is a sectional view on the line 00 w of Fig. 4. Fig. 7 is a sectional view of the aginected at their ends to a solid head 0 by means of two annular flanges or rings D and D.

A A designate the inlets to the interior of the drier, through which the solid matter or semisolid matter is introduced to said drier.

E E designate the round'journal ends of I a shaft which-is mounted in the longitudinal centerof the drier, passing through suitable stuffing-boxes E and supported .in arms or brackets E. The said shaft between the journal ends is square in cross-section,as at E. Upon the square portion of this shaft is arranged a multiplicity of hubs consisting each of two parts G and G, which embrace the square portion of said shaft and are made rigid thereto by bolts H. Each half of said hub has two straight parallel Sld6S'G and a straight surface G which lies at right angles to the sides G The surfaces G provide a suitable place on two sides of each hub for the attachment of the agitator-arms F. The surfaces G are inclosed on each side. by flanges G which extend in planes coinciding with the sides of the hub, as shown in Fig. 3. When'the two parts of each hub are brought together, as in Fig. 3, the outline of said hub presents asquare figure. It will be seen in Fig. 3. thatthe interior of each half of the hub is of a V shape, the angles being of ninety degrees, so that when the two parts are brought together their meeting edges are on a line running through the longitudinal axis of the shaft. split hubsprovides a rigid grip upon said 5 This mounting of the series of shaft, with an increased strength in the hub, by the greatest possible surface thereof being in contact with the shaft. This insures a positive movement of all the agitator-arms and provides a large'surface for fastening said agitator-arms to the hubs. A

F designates pairs of bars, which when united to the hubs provide a series of agitator-arms mounted alternately in quarterturns on the shaft. Each pair of these members F come together at their outer ends in parallel relation, as at H, and embrace a blade I, which is rigidly secured thereto by bolts 1. From this point the said bars or members diverge and have their inner ends rigidly connected to the hub by bolts H and H. Bolts II also connect the two parts of the hubs and hold them rigidly upon the shaft. Bolts H connect said members with the lateral extensions G on the hubs.

J designates a series of tie or distance pieces of substantially triangular form,whichlie between the diverging members F and to which said members are firmly connected by bolts f, the said pieces thus becoming braces which very materially strengthen the agitator-arm as a whole. These brace-pieces J may be solid or open frames providing suitable strength.

\Vhen the drier is in operation, one of the diverging agitator members is under tension, while the other one is in compression. The distance-piece or brace J will prevent the bending of the member in compression.

It will be observed from Fig. 2 that each agitator-arm extends from the shaft to near the inner shell, so that the material is gathered from points near the inner circumference of the shell.

Referring next to the improvements in the door, as set forth on Sheet 3 of the drawings, K designates a cast-metal piece riveted between the two shells of the drier and having a circular opening K therein. This opening is closed by a circular door L, which swings on a pivot consisting of a shaft M, to which said door is connected by a slotted arm N. The slotted end of said arm fits over a boss 0 in the center of said door and is connected to said boss by a pivot-bolt P, which forms a pivotal connection between said arm and door, allowing the door to swivel on the arm N, as shown in dotted lines in Fig. 5. To prevent the door from tilting on its pivot 0 while being thus moved to open it, there is a projection Q, connecting the arm N with said door ofi of the center of the door. This projection Q is free to move on its pivot Q, the said pivot Q passing through an opening in the projection Q, which is somewhat larger than the pivot Q. This connection of the door prevents said door from tilting when in a vertical position and allows sufficient clearance for the door to fit tightly in the opening K when said door is moved into said opening. The door, with all of its accessories, is operated to open and close through the shaft M, which shaft has upon it aworm-whee1S,which meshes with a worm S on shaft T, said shaft being turned by a hand-wheel T. When the door iselevated to its closed position, it may be tightly locked by means of a bridge-tree V, one end of which is pivoted to one side of the door and the other end of which terminates in a hook V, which engages with a standard V and becomes secured thereto. U is a screw which penetrates the center of said bridge-tree and makes contact with the boss 0 on the center of the door. It is essential to a proper operation of the drier that a vacuum be maintained therein during such operation. This is accomplished by means of a suitable connection between the doors and the openings. By turning this screw in one direction it will force the flange a of the door in rigid contact with the sides of the opening K, and thus the door may be tightly secured in position. Extending around the upper side of the flange a of said door is a packing-ring a, which provides a tight joint between the door and the opening which it closes. The packing-ring Ct, it is obvious, may be placed either in the flange a of the door or in the surrounding edge of the opening which the door closes, and the same results are obtainednamely, a tight connection between the door and the surrounding edge of the opening. When the bridge-tree V is swung to one side, as shown in Fig. 4, the door is free to be opened by turning the shaft T in a manner that will be readily comprehended.

Having described my invention, I claim- 1. In a drier, the combination with an agitator-shaft which is square in cross-section, of a two-part hub embracing the square portion of said shaft, each part of said hub having two parallel sides which join a straight side lying at right angles to said parallel sides, an agitator-arm the inner ends of which diverge and embrace the two straight sides of said hub, and bolts penetrating the portions of said agitator-arms which embrace the said opposite sides of the hub, the said bolts also uniting the two parts of the hub, substantially as set forth.

2. In a drier, the combination with an agitator-shaft which is square in cross-section, of a two-part hub, each of said parts embracing two sides of the shaft, an agitator-arm, the inner ends of which diverge and overlap two parallel sides of the hub when the two parts of said hub are united, bolts penetrating said overlapping ends of the arm and uniting the two parts of the hub, separate bolts uniting the diverging ends of said arm to each part of said hub, and braces interposed between the diverging ends of said arm, substantially as set forth.

3. In a drier, the combination with the inner and outer shells, a door, an arm to which said door has a central pivotal connection, said arm having a rigid connection to a shaft, and a loose connection between said door and said arm at one side of the center pivot of said door, substantially as set forth.

4. In a drier, a door havingapacking-ring in its upper flanged surface, an arm to which said door has a central pivotal'counection, a shaft to which said arm is rigidly connected,

and a loose connection between said door and said arm at one side of the center pivot of said door, substantially as set forth.

5. In a drier, a door, an arm to which said door has a central pivotal connection, an operating-shaft to which said arm is rigidly connected, a loose connection between said door and said arm at one side of the central pivot of said door, and a packing-ring interposed between said door and the surrounding edge of the opening, substantially as set forth.

6. In an apparatus of the type specified, the combination with a cylindrical body having an opening therein, of a door, the said door having a gasket or packing-ring between it and the surrounding edge of said opening, an arm to which said door has a pivotal connection at its center and a loose connection eccentric to said center pivotal connection so that said door is controlled in its movements by two pivotal points of connection with said arm, an operating-shaft to which said arm is rigidly connected, and means for locking said door when the same is elevated to a closed position, substantially as set forth.

7. In an apparatus of the type specified, the combination with a cylindrical body, the same having an opening therein, of a door, an arm, a pivotal connection between said arm and the center of said door, a further loose connection between said arm and said door, the latter connection being eccentric to the firstnamed pivotal connection, an operating-shaft to which said arm is rigidly connected and by which said arm is actuated to open and close the door, a bridge-tree, and means cooperating therewith whereby the door is locked when elevated by its supporting-arm to a closed position, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ARTHUR GIESLER.

Witnesses:

R. J. MOOARTY, JOHN W. KALBFUS. 

